"Ought" in interrogative sentences.

[Our Tort System]

Hello,

Take this sentence: "this is what you ought to know".
Can I turn it into a question like this:
What do you ought to know?

Or is there a better way from a native speaker's standpoint?
Also, do native speakers use "ought" often in interrogative sentences, or do they make do with "should"?

Thanks!
_________________
If it's not easy, don't do it!
That's how I got where I am.

[Beeesneees]

What ought you to know?
This is what you ought to know.

What should you know? <-- far more commonplace than the above question, as you seem to realise.
This is what you should know.
_________________
Cheers m' dears!

[Our Tort System]

Thank you, Bev.
Now it's clear to me.
_________________
If it's not easy, don't do it!
That's how I got where I am.

[Beeesneees]

Is it? Corrrrr! Can you explain it to me then, please? ;D

(Seriously... glad to help.)
_________________
Cheers m' dears!

[Our Tort System]

[E2e4]

Are there any of these questions below that do not carry any sense?

What should you know?
What ought you to know?
What will you know?
What shall you know?
What would you to know?
What must you know?
What can you know?
What could you know?
What may you know?
What might you know?

Thanks

[Beeesneees]

[E2e4]

[Our Tort System]